path: root/arch/aarch64/pthread_arch.h
diff options
authorRich Felker <>2020-08-24 22:23:08 -0400
committerRich Felker <>2020-08-27 18:36:45 -0400
commit3a5b9ae7cf656648c80fe155a5239d9b4fb4c485 (patch)
treefaef753db71ebd66802f84034478dd5c982bdd92 /arch/aarch64/pthread_arch.h
parentea71a9004e08030a15d45186e263fd2b0c51cc25 (diff)
deduplicate __pthread_self thread pointer adjustment out of each arch
the adjustment made is entirely a function of TLS_ABOVE_TP and TP_OFFSET. aside from avoiding repetition of the TP_OFFSET value and arithmetic, this change makes pthread_arch.h independent of the definition of struct __pthread from pthread_impl.h. this in turn will allow inclusion of pthread_arch.h to be moved to the top of pthread_impl.h so that it can influence the definition of the structure. previously, arch files were very inconsistent about the type used for the thread pointer. this change unifies the new __get_tp interface to always use uintptr_t, which is the most correct when performing arithmetic that may involve addresses outside the actual pointed-to object (due to TP_OFFSET).
Diffstat (limited to 'arch/aarch64/pthread_arch.h')
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/aarch64/pthread_arch.h b/arch/aarch64/pthread_arch.h
index f3c005c7..3909616c 100644
--- a/arch/aarch64/pthread_arch.h
+++ b/arch/aarch64/pthread_arch.h
@@ -1,8 +1,8 @@
-static inline struct pthread *__pthread_self()
+static inline uintptr_t __get_tp()
- char *self;
- __asm__ ("mrs %0,tpidr_el0" : "=r"(self));
- return (void*)(self - sizeof(struct pthread));
+ uintptr_t tp;
+ __asm__ ("mrs %0,tpidr_el0" : "=r"(tp));
+ return tp;
#define TLS_ABOVE_TP